GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include <string.h>

#include "vcc_compile.h"

/*--------------------------------------------------------------------*/

static void vcc_Compound(struct vcc *tl);

/*--------------------------------------------------------------------*/

#define L(tl, foo)      do {    \
        tl->indent += INDENT;   \
        foo;                    \
        tl->indent -= INDENT;   \
} while (0)

#define C(tl, sep)      do {                                            \
        Fb(tl, 1, "VPI_count(ctx, VGC_NREFS, %u)%s\n", ++tl->cnt, sep); \
        Fb(tl, 1, "if (UNLIKELY(ctx->vpi->trace)) VPI_trace(ctx, %u)%s\n", \
           tl->cnt, sep);                                               \
        tl->t->cnt = tl->cnt;                                           \
} while (0)

/*--------------------------------------------------------------------
 * SYNTAX:
 *    Conditional:
 *      '(' Cond_0 ')'
 */

static void
vcc_Conditional(struct vcc *tl)
{

        SkipToken(tl, '(');
        Fb(tl, 0, "(\n");
        L(tl, vcc_Expr(tl, BOOL));
        ERRCHK(tl);
        Fb(tl, 1, ")\n");
        SkipToken(tl, ')');
}

/*--------------------------------------------------------------------
 * SYNTAX:
 *    IfStmt:
 *      'if' Conditional  Compound Branch1* Branch2
 *    Branch1:
 *      'elseif' Conditional Compound
 *    Branch2:
 *      'else' Compound
 *      null
 */

void v_matchproto_(sym_act_f)
vcc_Act_If(struct vcc *tl, struct token *t, struct symbol *sym)
{

        (void)t;
        (void)sym;
        Fb(tl, 1, "if ");
        vcc_Conditional(tl);
        ERRCHK(tl);
        L(tl, vcc_Compound(tl));
        ERRCHK(tl);
        while (tl->t->tok == ID) {
                if (vcc_IdIs(tl->t, "else")) {
                        vcc_NextToken(tl);
                        if (tl->t->tok == '{') {
                                Fb(tl, 1, "else\n");
                                L(tl, vcc_Compound(tl));
                                ERRCHK(tl);
                                return;
                        }
                        if (tl->t->tok != ID || !vcc_IdIs(tl->t, "if")) {
                                VSB_printf(tl->sb,
                                    "'else' must be followed by 'if' or '{'\n");
                                vcc_ErrWhere(tl, tl->t);
                                return;
                        }
                        Fb(tl, 1, "else if ");
                        vcc_NextToken(tl);
                        vcc_Conditional(tl);
                        ERRCHK(tl);
                        L(tl, vcc_Compound(tl));
                        ERRCHK(tl);
                } else if (vcc_IdIs(tl->t, "elseif") ||
                     vcc_IdIs(tl->t, "elsif") ||
                     vcc_IdIs(tl->t, "elif")) {
                        Fb(tl, 1, "else if ");
                        vcc_NextToken(tl);
                        vcc_Conditional(tl);
                        ERRCHK(tl);
                        L(tl, vcc_Compound(tl));
                        ERRCHK(tl);
                } else {
                        break;
                }
        }
        C(tl, ";");
}

/*--------------------------------------------------------------------
 * SYNTAX:
 *    Compound:
 *      '{' Stmt* '}'
 *
 *    Stmt:
 *      Compound
 *      IfStmt
 *      CSRC
 *      Id(Action) (XXX)
 */

static void
vcc_Compound(struct vcc *tl)
{
        struct symbol *sym;
        struct token *t;

        SkipToken(tl, '{');
        Fb(tl, 1, "{\n");
        tl->indent += INDENT;
        C(tl, ";");
        Fb(tl, 1, "END_;\n");
        while (1) {
                ERRCHK(tl);
                t = tl->t;
                switch (tl->t->tok) {
                case '{':
                        vcc_Compound(tl);
                        break;
                case '}':
                        vcc_NextToken(tl);
                        tl->indent -= INDENT;
                        Fb(tl, 1, "}\n");
                        return;
                case CSRC:
                        if (tl->allow_inline_c) {
                                Fb(tl, 1, "%.*s\n",
                                    (int) (tl->t->e - (tl->t->b + 2)),
                                    tl->t->b + 1);
                                vcc_NextToken(tl);
                        } else {
                                VSB_printf(tl->sb,
                                    "Inline-C not allowed\n");
                                vcc_ErrWhere(tl, tl->t);
                        }
                        break;
                case EOI:
                        VSB_printf(tl->sb,
                            "End of input while in compound statement\n");
                        tl->err = 1;
                        return;
                case ID:
                        sym = VCC_SymbolGet(tl, SYM_MAIN, SYM_NONE,
                            SYMTAB_PARTIAL, XREF_NONE);
                        if (sym == NULL) {
                                VSB_printf(tl->sb, "Symbol not found.\n");
                                vcc_ErrWhere(tl, tl->t);
                                return;
                        }
                        if (sym->action == NULL) {
                                VSB_printf(tl->sb,
                                    "Symbol cannot be used here.\n");
                                vcc_ErrWhere(tl, tl->t);
                                return;
                        }
                        if (sym->action_mask != 0)
                                vcc_AddUses(tl, t, NULL, sym, XREF_ACTION);
                        sym->action(tl, t, sym);
                        break;
                default:
                        /* We deliberately do not mention inline C */
                        VSB_printf(tl->sb,
                            "Expected an action, 'if', '{' or '}'\n");
                        vcc_ErrWhere(tl, tl->t);
                        return;
                }
                Fb(tl, 1, "END_;\n");
        }
}

/*--------------------------------------------------------------------
 * SYNTAX:
 *    Function:
 *      'sub' ID(name) Compound
 */

static void
vcc_ParseFunction(struct vcc *tl)
{
        struct symbol *sym, *bsym;
        struct token *t;
        struct proc *p;

        vcc_NextToken(tl);
        vcc_ExpectVid(tl, "subroutine");
        ERRCHK(tl);

        t = tl->t;
        sym = VCC_SymbolGet(tl, SYM_MAIN, SYM_SUB, SYMTAB_CREATE, XREF_DEF);
        ERRCHK(tl);
        AN(sym);

        if (vcc_builtin != NULL) {
                vcc_builtin->t = t;
                bsym = VCC_SymbolGet(vcc_builtin, SYM_MAIN, SYM_SUB,
                    SYMTAB_NOERR, XREF_NONE);
                AZ(vcc_builtin->err);
        }
        else
                bsym = NULL;

        p = sym->proc;
        if (p == NULL) {
                if (vcc_builtin != NULL && bsym == NULL &&
                    vcc_Has_vcl_prefix(t->b)) {
                        VSB_printf(tl->sb,"The names 'vcl_*'"
                            " are reserved for subroutines.\n");
                        vcc_ErrWhere(tl, t);
                        VSB_printf(tl->sb, "Valid vcl_* subroutines are:\n");
                        VTAILQ_FOREACH(p, &vcc_builtin->procs, list) {
                                t = p->name;
                                VSB_printf(tl->sb, "\t%.*s\n",
                                    (int)pdiff(t->b, t->e), t->b);
                        }
                        return;
                }
                VCC_GlobalSymbol(sym, SUB);
                p = vcc_NewProc(tl, sym);
                p->name = t;
                VSB_printf(p->cname, "%s", sym->lname);
        } else if (p->method == NULL && bsym == NULL) {
                VSB_printf(tl->sb, "Subroutine '%s' redefined\n", sym->name);
                vcc_ErrWhere(tl, t);
                VSB_printf(tl->sb, "Previously defined here:\n");
                vcc_ErrWhere(tl, p->name);
                return;
        } else {
                /* Add to VCL sub */
                if (p->name == NULL)
                        p->name = t;
        }
        CHECK_OBJ_NOTNULL(p, PROC_MAGIC);
        tl->fb = p->body;
        Fb(tl, 1, "  /* ... from ");
        vcc_Coord(tl, p->body, NULL);
        Fb(tl, 0, " */\n");
        tl->curproc = p;
        tl->indent += INDENT;
        Fb(tl, 1, "{\n");
        L(tl, vcc_Compound(tl));
        Fb(tl, 1, "}\n");
        tl->indent -= INDENT;
        tl->fb = NULL;
        tl->curproc = NULL;
}

/*--------------------------------------------------------------------
 */

static void
vcc_ParseVcl(struct vcc *tl)
{
        struct token *tok0;
        int syntax;

        assert(vcc_IdIs(tl->t, "vcl"));
        tok0 = tl->t;
        vcc_NextToken(tl);

        Expect(tl, FNUM);
        if (tl->t->e - tl->t->b != 3 || tl->t->b[1] != '.') {
                VSB_cat(tl->sb,
                    "Don't play silly buggers with VCL version numbers\n");
                vcc_ErrWhere(tl, tl->t);
                ERRCHK(tl);
        }
        syntax = (tl->t->b[0] - '0') * 10 + (tl->t->b[2] - '0');
        vcc_NextToken(tl);

        if (syntax < VCL_LOW || syntax > VCL_HIGH) {
                VSB_printf(tl->sb, "VCL version %.1f not supported.\n",
                    .1 * syntax);
                vcc_ErrWhere2(tl, tok0, tl->t);
                ERRCHK(tl);
        }

        if (tl->t->tok != ';') {
                /* Special handling, because next token might be 'vcl'
                 * in the built-in VCL, and that would give a very
                 * confusing error message
                 */
                VSB_cat(tl->sb, "Expected 'vcl N.N;' found no semi-colon\n");
                vcc_ErrWhere2(tl, tok0, tl->t);
                ERRCHK(tl);
        }
        vcc_NextToken(tl);
        if (tl->syntax == 0)
                tl->syntax = syntax;
        if (syntax > tl->syntax) {
                VSB_printf(tl->sb,
                    "VCL version %.1f higher than"
                    " the top level version %.1f\n",
                    .1 * syntax, .1 * tl->syntax);
                vcc_ErrWhere2(tl, tok0, tl->t);
                ERRCHK(tl);
        }
}

/*--------------------------------------------------------------------
 * Top level of parser, recognize:
 *      Inline C-code
 *      ACL definitions
 *      Function definitions
 *      Backend definitions
 *      VMOD import directives
 *      VCL version declarations
 *      End of input
 */

typedef void parse_f(struct vcc *tl);

static struct toplev {
        const char      *name;
        parse_f         *func;
        unsigned        vcllo;
        unsigned        vclhi;
} toplev[] = {
        { "acl",                vcc_ParseAcl,           VCL_41, VCL_HIGH },
        { "sub",                vcc_ParseFunction,      VCL_41, VCL_HIGH },
        { "backend",            vcc_ParseBackend,       VCL_41, VCL_HIGH },
        { "probe",              vcc_ParseProbe,         VCL_41, VCL_HIGH },
        { "import",             vcc_ParseImport,        VCL_41, VCL_HIGH },
        { "vcl",                vcc_ParseVcl,           VCL_41, VCL_HIGH },
        { NULL, NULL }
};

void
vcc_Parse(struct vcc *tl)
{
        struct toplev *tp;

        AZ(tl->indent);
        if (tl->t->tok != ID || !vcc_IdIs(tl->t, "vcl")) {
                VSB_cat(tl->sb,
                    "VCL version declaration missing\n"
                    "Update your VCL to Version 4 syntax, and add\n"
                    "\tvcl 4.1;\n"
                    "on the first line of the VCL files.\n"
                );
                vcc_ErrWhere(tl, tl->t);
                ERRCHK(tl);
        }
        vcc_ParseVcl(tl);
        ERRCHK(tl);
        AN(tl->syntax);
        while (tl->t->tok != EOI) {
                ERRCHK(tl);
                switch (tl->t->tok) {
                case CSRC:
                        if (tl->allow_inline_c) {
                                Fc(tl, 0, "%.*s\n",
                                    (int) (tl->t->e - (tl->t->b + 4)),
                                    tl->t->b + 2);
                                vcc_NextToken(tl);
                        } else {
                                VSB_cat(tl->sb, "Inline-C not allowed\n");
                                vcc_ErrWhere(tl, tl->t);
                        }
                        break;
                case EOI:
                        break;
                case ID:
                        for (tp = toplev; tp->name != NULL; tp++) {
                                if (tp->func == NULL)
                                        continue;
                                if (!vcc_IdIs(tl->t, tp->name))
                                        continue;
                                tp->func(tl);
                                break;
                        }
                        if (tp->name != NULL)
                                break;
                        /* FALLTHROUGH */
                default:
                        /* We deliberately do not mention inline-C */
                        VSB_cat(tl->sb, "Expected one of\n\t");
                        for (tp = toplev; tp->name != NULL; tp++) {
                                if (tp[1].name == NULL)
                                        VSB_cat(tl->sb, " or ");
                                VSB_printf(tl->sb, "'%s'", tp->name);
                                if (tp[1].name != NULL)
                                        VSB_cat(tl->sb, ", ");
                        }
                        VSB_cat(tl->sb, "\nFound: ");
                        vcc_ErrToken(tl, tl->t);
                        VSB_cat(tl->sb, " at\n");
                        vcc_ErrWhere(tl, tl->t);
                        return;
                }
        }
        AZ(tl->indent);
}

void
vcc_Parse_Init(struct vcc *tl)
{
        struct toplev *tp;

        for (tp = toplev; tp->name != NULL; tp++)
                AN(VCC_MkSym(tl, tp->name, SYM_MAIN, SYM_RESERVED,
                    tp->vcllo, tp->vclhi));
}

		varnish-cache/lib/libvcc/vcc_parse.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*/
30
31		#include "config.h"
32
33		#include <string.h>
34
35		#include "vcc_compile.h"
36
37		/--------------------------------------------------------------------/
38
39		static void vcc_Compound(struct vcc *tl);
40
41		/--------------------------------------------------------------------/
42
43		#define L(tl, foo) do { \
44		tl->indent += INDENT; \
45		foo; \
46		tl->indent -= INDENT; \
47		} while (0)
48
49		#define C(tl, sep) do { \
50		Fb(tl, 1, "VPI_count(ctx, VGC_NREFS, %u)%s\n", ++tl->cnt, sep); \
51		Fb(tl, 1, "if (UNLIKELY(ctx->vpi->trace)) VPI_trace(ctx, %u)%s\n", \
52		tl->cnt, sep); \
53		tl->t->cnt = tl->cnt; \
54		} while (0)
55
56		/*--------------------------------------------------------------------
57		* SYNTAX:
58		* Conditional:
59		* '(' Cond_0 ')'
60		*/
61
62		static void
63	1981000	vcc_Conditional(struct vcc *tl)
64		{
65
66	1981000	SkipToken(tl, '(');
67	1981000	Fb(tl, 0, "(\n");
68	1981000	L(tl, vcc_Expr(tl, BOOL));
69	1981000	ERRCHK(tl);
70	1979720	Fb(tl, 1, ")\n");
71	1979720	SkipToken(tl, ')');
72	1981000	}
73
74		/*--------------------------------------------------------------------
75		* SYNTAX:
76		* IfStmt:
77		* 'if' Conditional Compound Branch1* Branch2
78		* Branch1:
79		* 'elseif' Conditional Compound
80		* Branch2:
81		* 'else' Compound
82		* null
83		*/
84
85		void v_matchproto_(sym_act_f)
86	1975640	vcc_Act_If(struct vcc tl, struct token t, struct symbol *sym)
87		{
88
89	1975640	(void)t;
90	1975640	(void)sym;
91	1975640	Fb(tl, 1, "if ");
92	1975640	vcc_Conditional(tl);
93	1975640	ERRCHK(tl);
94	1974320	L(tl, vcc_Compound(tl));
95	1974320	ERRCHK(tl);
96	1979680	while (tl->t->tok == ID) {
97	478720	if (vcc_IdIs(tl->t, "else")) {
98	120520	vcc_NextToken(tl);
99	120520	if (tl->t->tok == '{') {
100	117400	Fb(tl, 1, "else\n");
101	117400	L(tl, vcc_Compound(tl));
102	117400	ERRCHK(tl);
103	117400	return;
104		}
105	3120	if (tl->t->tok != ID \|\| !vcc_IdIs(tl->t, "if")) {
106	0	VSB_printf(tl->sb,
107		"'else' must be followed by 'if' or '{'\n");
108	0	vcc_ErrWhere(tl, tl->t);
109	0	return;
110		}
111	3120	Fb(tl, 1, "else if ");
112	3120	vcc_NextToken(tl);
113	3120	vcc_Conditional(tl);
114	3120	ERRCHK(tl);
115	3120	L(tl, vcc_Compound(tl));
116	3120	ERRCHK(tl);
117	717400	} else if (vcc_IdIs(tl->t, "elseif") \|\|
118	358120	vcc_IdIs(tl->t, "elsif") \|\|
119	356080	vcc_IdIs(tl->t, "elif")) {
120	2240	Fb(tl, 1, "else if ");
121	2240	vcc_NextToken(tl);
122	2240	vcc_Conditional(tl);
123	2240	ERRCHK(tl);
124	2240	L(tl, vcc_Compound(tl));
125	2240	ERRCHK(tl);
126	2240	} else {
127	355960	break;
128		}
129		}
130	1856920	C(tl, ";");
131	1975640	}
132
133		/*--------------------------------------------------------------------
134		* SYNTAX:
135		* Compound:
136		* '{' Stmt* '}'
137		*
138		* Stmt:
139		* Compound
140		* IfStmt
141		* CSRC
142		* Id(Action) (XXX)
143		*/
144
145		static void
146	6857000	vcc_Compound(struct vcc *tl)
147		{
148		struct symbol *sym;
149		struct token *t;
150
151	6857000	SkipToken(tl, '{');
152	6857000	Fb(tl, 1, "{\n");
153	6857000	tl->indent += INDENT;
154	6857000	C(tl, ";");
155	6857000	Fb(tl, 1, "END_;\n");
156	16918240	while (1) {
157	16918240	ERRCHK(tl);
158	16913680	t = tl->t;
159	16913680	switch (tl->t->tok) {
160		case '{':
161	80	vcc_Compound(tl);
162	80	break;
163		case '}':
164	6852240	vcc_NextToken(tl);
165	6852240	tl->indent -= INDENT;
166	6852240	Fb(tl, 1, "}\n");
167	6852240	return;
168		case CSRC:
169	600	if (tl->allow_inline_c) {
170	1120	Fb(tl, 1, "%.*s\n",
171	560	(int) (tl->t->e - (tl->t->b + 2)),
172	560	tl->t->b + 1);
173	560	vcc_NextToken(tl);
174	560	} else {
175	40	VSB_printf(tl->sb,
176		"Inline-C not allowed\n");
177	40	vcc_ErrWhere(tl, tl->t);
178		}
179	600	break;
180		case EOI:
181	0	VSB_printf(tl->sb,
182		"End of input while in compound statement\n");
183	0	tl->err = 1;
184	0	return;
185		case ID:
186	10060760	sym = VCC_SymbolGet(tl, SYM_MAIN, SYM_NONE,
187		SYMTAB_PARTIAL, XREF_NONE);
188	10060760	if (sym == NULL) {
189	160	VSB_printf(tl->sb, "Symbol not found.\n");
190	160	vcc_ErrWhere(tl, tl->t);
191	160	return;
192		}
193	10060600	if (sym->action == NULL) {
194	40	VSB_printf(tl->sb,
195		"Symbol cannot be used here.\n");
196	40	vcc_ErrWhere(tl, tl->t);
197	40	return;
198		}
199	10060560	if (sym->action_mask != 0)
200	352320	vcc_AddUses(tl, t, NULL, sym, XREF_ACTION);
201	10060560	sym->action(tl, t, sym);
202	10060560	break;
203		default:
204		/* We deliberately do not mention inline C */
205	0	VSB_printf(tl->sb,
206		"Expected an action, 'if', '{' or '}'\n");
207	0	vcc_ErrWhere(tl, tl->t);
208	0	return;
209		}
210	10061240	Fb(tl, 1, "END_;\n");
211		}
212	6857000	}
213
214		/*--------------------------------------------------------------------
215		* SYNTAX:
216		* Function:
217		* 'sub' ID(name) Compound
218		*/
219
220		static void
221	4760000	vcc_ParseFunction(struct vcc *tl)
222		{
223		struct symbol sym, bsym;
224		struct token *t;
225		struct proc *p;
226
227	4760000	vcc_NextToken(tl);
228	4760000	vcc_ExpectVid(tl, "subroutine");
229	4760000	ERRCHK(tl);
230
231	4759960	t = tl->t;
232	4759960	sym = VCC_SymbolGet(tl, SYM_MAIN, SYM_SUB, SYMTAB_CREATE, XREF_DEF);
233	4759960	ERRCHK(tl);
234	4759920	AN(sym);
235
236	4759920	if (vcc_builtin != NULL) {
237	2219560	vcc_builtin->t = t;
238	2219560	bsym = VCC_SymbolGet(vcc_builtin, SYM_MAIN, SYM_SUB,
239		SYMTAB_NOERR, XREF_NONE);
240	2219560	AZ(vcc_builtin->err);
241	2219560	}
242		else
243	2540360	bsym = NULL;
244
245	4759920	p = sym->proc;
246	4759920	if (p == NULL) {
247	2977560	if (vcc_builtin != NULL && bsym == NULL &&
248	3160	vcc_Has_vcl_prefix(t->b)) {
249	40	VSB_printf(tl->sb,"The names 'vcl_*'"
250		" are reserved for subroutines.\n");
251	40	vcc_ErrWhere(tl, t);
252	40	VSB_printf(tl->sb, "Valid vcl_* subroutines are:\n");
253	1680	VTAILQ_FOREACH(p, &vcc_builtin->procs, list) {
254	1640	t = p->name;
255	3280	VSB_printf(tl->sb, "\t%.*s\n",
256	1640	(int)pdiff(t->b, t->e), t->b);
257	1640	}
258	40	return;
259		}
260	2977520	VCC_GlobalSymbol(sym, SUB);
261	2977520	p = vcc_NewProc(tl, sym);
262	2977520	p->name = t;
263	2977520	VSB_printf(p->cname, "%s", sym->lname);
264	4759880	} else if (p->method == NULL && bsym == NULL) {
265	40	VSB_printf(tl->sb, "Subroutine '%s' redefined\n", sym->name);
266	40	vcc_ErrWhere(tl, t);
267	40	VSB_printf(tl->sb, "Previously defined here:\n");
268	40	vcc_ErrWhere(tl, p->name);
269	40	return;
270		} else {
271		/* Add to VCL sub */
272	1782320	if (p->name == NULL)
273	1720880	p->name = t;
274		}
275	4759840	CHECK_OBJ_NOTNULL(p, PROC_MAGIC);
276	4759840	tl->fb = p->body;
277	4759840	Fb(tl, 1, " /* ... from ");
278	4759840	vcc_Coord(tl, p->body, NULL);
279	4759840	Fb(tl, 0, " */\n");
280	4759840	tl->curproc = p;
281	4759840	tl->indent += INDENT;
282	4759840	Fb(tl, 1, "{\n");
283	4759840	L(tl, vcc_Compound(tl));
284	4759840	Fb(tl, 1, "}\n");
285	4759840	tl->indent -= INDENT;
286	4759840	tl->fb = NULL;
287	4759840	tl->curproc = NULL;
288	4760000	}
289
290		/*--------------------------------------------------------------------
291		*/
292
293		static void
294	175120	vcc_ParseVcl(struct vcc *tl)
295		{
296		struct token *tok0;
297		int syntax;
298
299	175120	assert(vcc_IdIs(tl->t, "vcl"));
300	175120	tok0 = tl->t;
301	175120	vcc_NextToken(tl);
302
303	175120	Expect(tl, FNUM);
304	175120	if (tl->t->e - tl->t->b != 3 \|\| tl->t->b[1] != '.') {
305	120	VSB_cat(tl->sb,
306		"Don't play silly buggers with VCL version numbers\n");
307	120	vcc_ErrWhere(tl, tl->t);
308	120	ERRCHK(tl);
309	0	}
310	175000	syntax = (tl->t->b[0] - '0') * 10 + (tl->t->b[2] - '0');
311	175000	vcc_NextToken(tl);
312
313	175000	if (syntax < VCL_LOW \|\| syntax > VCL_HIGH) {
314	160	VSB_printf(tl->sb, "VCL version %.1f not supported.\n",
315	80	.1 * syntax);
316	80	vcc_ErrWhere2(tl, tok0, tl->t);
317	80	ERRCHK(tl);
318	0	}
319
320	174920	if (tl->t->tok != ';') {
321		/* Special handling, because next token might be 'vcl'
322		* in the built-in VCL, and that would give a very
323		* confusing error message
324		*/
325	40	VSB_cat(tl->sb, "Expected 'vcl N.N;' found no semi-colon\n");
326	40	vcc_ErrWhere2(tl, tok0, tl->t);
327	40	ERRCHK(tl);
328	0	}
329	174880	vcc_NextToken(tl);
330	174880	if (tl->syntax == 0)
331	122320	tl->syntax = syntax;
332	174880	if (syntax > tl->syntax) {
333	0	VSB_printf(tl->sb,
334		"VCL version %.1f higher than"
335		" the top level version %.1f\n",
336	0	.1 * syntax, .1 * tl->syntax);
337	0	vcc_ErrWhere2(tl, tok0, tl->t);
338	0	ERRCHK(tl);
339	0	}
340	175120	}
341
342		/*--------------------------------------------------------------------
343		* Top level of parser, recognize:
344		* Inline C-code
345		* ACL definitions
346		* Function definitions
347		* Backend definitions
348		* VMOD import directives
349		* VCL version declarations
350		* End of input
351		*/
352
353		typedef void parse_f(struct vcc *tl);
354
355		static struct toplev {
356		const char *name;
357		parse_f *func;
358		unsigned vcllo;
359		unsigned vclhi;
360		} toplev[] = {
361		{ "acl", vcc_ParseAcl, VCL_41, VCL_HIGH },
362		{ "sub", vcc_ParseFunction, VCL_41, VCL_HIGH },
363		{ "backend", vcc_ParseBackend, VCL_41, VCL_HIGH },
364		{ "probe", vcc_ParseProbe, VCL_41, VCL_HIGH },
365		{ "import", vcc_ParseImport, VCL_41, VCL_HIGH },
366		{ "vcl", vcc_ParseVcl, VCL_41, VCL_HIGH },
367		{ NULL, NULL }
368		};
369
370		void
371	122520	vcc_Parse(struct vcc *tl)
372		{
373		struct toplev *tp;
374
375	122520	AZ(tl->indent);
376	122520	if (tl->t->tok != ID \|\| !vcc_IdIs(tl->t, "vcl")) {
377	40	VSB_cat(tl->sb,
378		"VCL version declaration missing\n"
379		"Update your VCL to Version 4 syntax, and add\n"
380		"\tvcl 4.1;\n"
381		"on the first line of the VCL files.\n"
382		);
383	40	vcc_ErrWhere(tl, tl->t);
384	40	ERRCHK(tl);
385	0	}
386	122480	vcc_ParseVcl(tl);
387	122480	ERRCHK(tl);
388	122320	AN(tl->syntax);
389	5029480	while (tl->t->tok != EOI) {
390	4915080	ERRCHK(tl);
391	4907240	switch (tl->t->tok) {
392		case CSRC:
393	360	if (tl->allow_inline_c) {
394	640	Fc(tl, 0, "%.*s\n",
395	320	(int) (tl->t->e - (tl->t->b + 4)),
396	320	tl->t->b + 2);
397	320	vcc_NextToken(tl);
398	320	} else {
399	40	VSB_cat(tl->sb, "Inline-C not allowed\n");
400	40	vcc_ErrWhere(tl, tl->t);
401		}
402	360	break;
403		case EOI:
404	0	break;
405		case ID:
406	10164440	for (tp = toplev; tp->name != NULL; tp++) {
407	10164400	if (tp->func == NULL)
408	0	continue;
409	10164400	if (!vcc_IdIs(tl->t, tp->name))
410	5257600	continue;
411	4906800	tp->func(tl);
412	4906800	break;
413		}
414	4906840	if (tp->name != NULL)
415	4906800	break;
416		/* FALLTHROUGH */
417		default:
418		/* We deliberately do not mention inline-C */
419	80	VSB_cat(tl->sb, "Expected one of\n\t");
420	560	for (tp = toplev; tp->name != NULL; tp++) {
421	480	if (tp[1].name == NULL)
422	80	VSB_cat(tl->sb, " or ");
423	480	VSB_printf(tl->sb, "'%s'", tp->name);
424	480	if (tp[1].name != NULL)
425	400	VSB_cat(tl->sb, ", ");
426	480	}
427	80	VSB_cat(tl->sb, "\nFound: ");
428	80	vcc_ErrToken(tl, tl->t);
429	80	VSB_cat(tl->sb, " at\n");
430	80	vcc_ErrWhere(tl, tl->t);
431	80	return;
432		}
433		}
434	114400	AZ(tl->indent);
435	122520	}
436
437		void
438	123880	vcc_Parse_Init(struct vcc *tl)
439		{
440		struct toplev *tp;
441
442	867160	for (tp = toplev; tp->name != NULL; tp++)
443	743280	AN(VCC_MkSym(tl, tp->name, SYM_MAIN, SYM_RESERVED,
444		tp->vcllo, tp->vclhi));
445	123880	}